/*
 * @Author: c
 * @Date: 2024-02-19 16:41:20
 * @LastEditTime: 2024-02-19 16:47:33
 * @LastEditors: c
 * @Description: 
 * @FilePath: \music-web-backend\src\core\system\minio\Converter.ts
 * https://github.com/OBKoro1/koro1FileHeader/wiki/%E9%85%8D%E7%BD%AE
 */
// Copyright 2024 Administrator
// 
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// 
//     http://www.apache.org/licenses/LICENSE-2.0
// 
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

const ffmpegInstaller = require('@ffmpeg-installer/ffmpeg');
const ffmpeg = require('fluent-ffmpeg');

ffmpeg.setFfmpegPath(ffmpegInstaller.path);
const stream = require('stream');
const MemoryStream = require('memory-stream');
const Writable = require('stream').Writable;

export class Converter {
    async wcam265ToMp4(buffer, filename) {
        const fs = require('fs')
        let outStream = new MemoryStream();
        //var outStream = fs.createWriteStream('output.mp4');
        //let bufferStream = new stream.PassThrough();
        return new Promise((resolve, reject) => {
            //console.log(buffer);
            console.log(filename);
            ffmpeg({
                source: stream.Readable.from(buffer, { objectMode: false })
            })
                .addOption('-c:v', 'libx265')
                .addOption('-movflags', 'faststart')
                .addOption('-movflags', 'frag_keyframe+empty_moov')
                .addOption('-f', 'mp4')
                .output(outStream, { end: true })
                .on('error', function (err, stdout, stderr) {
                    console.log('Ошибка:', err);
                    console.log('Стандартный вывод:', stdout);
                    console.log('Стандартный поток ошибок:', stderr);
                })
                .on('end', function () {
                    console.log('Закончено!');
                    resolve(outStream.toBuffer());
                })
                .run();
        });
    }
}


